Crush

You target one creature within range. It must succeed on a Strength saving throw or be trapped in a field of gravity that compresses it and forces it to fold in on itself. On a failure, it takes 12d10 bludgeoning damage, falls prone, and its speed is reduced to 0 until the start of your next turn as it reels from the pain. 

At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, you can target one additional creature within range for each slot level above 7th.